Title :
Coating of porous polytetrafluoroethylene films with other polymers for electret applications
Author :
Wegener, M. ; Wirges, W. ; Künstler, W. ; Gerhard-Multhaupt, R. ; Elling, B. ; Pinnow, M. ; Danz, R.
Author_Institution :
Dept. of Phys., Univ. of Potsdam, Germany
Abstract :
Porous polytetrafluoroethylene (PTFE) films are attractive for electret applications because of their unusual mechanical properties and their excellent charge-storage capabilities. The direct application of electrodes is facilitated and the charge stability of the open-porous films is improved, if the porous PTFE films are coated with layers of other suitable polymers. Here, we report on the preparation of coated porous PTFE films and their investigation by means of scanning electron microscopy, corona charging and surface-potential measurements. For the coating, non-porous polymers like polystyrene (PS), polyethylene terephthalate (PETP) and Teflon(R) AF were employed. After optimization, such layered films may be suitable for a range of electret-transducer applications under various environmental conditions
Keywords :
electrets; glass transition; piezoelectricity; polymer films; porous materials; scanning electron microscopy; surface charging; surface potential; surface treatment; PETP; PS; PTFE films; Teflon; charge stability; charge-storage; coated porous PTFE films; corona charging; electret applications; electret-transducer applications; electrodes; nonporous polymers; open-porous films; polyethylene terephthalate; polymer coatings; polystyrene; porous polytetrafluoroethylene films; scanning electron microscopy; surface-potential measurements; Coatings; Corona; Electrets; Electrodes; Mechanical factors; Polyethylene; Polymer films; Scanning electron microscopy; Stability; Surface charging;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on
Conference_Location :
Kitchener, Ont.
Print_ISBN :
0-7803-7053-8
DOI :
10.1109/CEIDP.2001.963497
